Some recommended brands are Nicolet, Medasonics, and Summit. Granted these brands range in $400.00. The best places to buy these are over the internet because very few stores sell them. The disadvantages of these are very few but you still should consider them. One is the psychological implications. If the mom has had some bad experiences with pregnancy or is a first time mother if she can’t pick up the heartbeat it can send her into a whirlwind of concern, paranoia, or stress. Also babies don’t stay in one place when they are in the uterus so it can be hard to pick up the heartbeat since they are moving around so much. Doctors also stress the importance of not using the machine to excess because as there are no documented risks associated with the monitors you still have to be careful. As with anything else you should talk to your physician regarding these monitors. If you decide to go ahead and rent or buy a monitor be sure you are ready to handle it properly. Never overdue it by using the monitor too much. It will only add stress to a time that is supposed to be a joyous moment. Make sure to do some added research on the monitor that you plan to use. Good luck on your search for the perfect monitor for you. Visit rent fetal doppler and baby heart monitors for more information.